Compression Check while engine is out?
09-02-2013, 11:55 AM
#1
On The Tree
Thread Starter
Compression Check while engine is out? I'm trying to determine if a long block is good......
While the long block is on a stand can I just....
0. Make sure it has oil.
1. remove all the plugs
2. Install a plug one at a time and check compression by
Turning the crank with an impact gun and measuring with a gauge?
Has anyone ever done this?
Is there a better way to do it?
The engine(LQ9) looks really clean.....and I don't want to tear it apart if I don't have to.....I'd rather just slap some ported heads on it and go.
While the long block is on a stand can I just....
0. Make sure it has oil.
1. remove all the plugs
2. Install a plug one at a time and check compression by
Turning the crank with an impact gun and measuring with a gauge?
Has anyone ever done this?
Is there a better way to do it?
The engine(LQ9) looks really clean.....and I don't want to tear it apart if I don't have to.....I'd rather just slap some ported heads on it and go.
09-02-2013, 12:24 PM
#2
I wouldnt use an impact to turn it, I dont think that you would get a fast enough rotation to get a good reading. I am not sure that there would be much rotation at all, the best bet is to use the starter hooked up to a battery.
09-02-2013, 12:59 PM
#4
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How about getting a leak down tester and cking leak down.Should be performed in the car when warm but you could still get an idea on ring and valve seal.